Nighthawk CAX30 - ISP Can see Router, but can't connect to Router via Ethernet or WiFi

[MooCowDiveBomb]

Very suddenly I cannot connect to my Router/Modem. My ISP, Xfinitiy, can see it, and I can even reset it through my Xfinity account.

However, I cannot connect to device itself. It doesn't show up when looking for wifi networks, can I can't connect to it via ethernet cable either. Tried multiple devices too. I've done a factory reset and that also hasn't worked. The router seems like it's gone totally dark. What do I try next?

[plemans]

What are all the led's on it doing? 

Try disconnecting the coax from it and resetting it. Then reconnect the coax (as it'll enter a boot loop without the coax connected)

If that doesn't help, you might need to check if its still in warranty